CN102248879A - Locking mechanism for chassis battery of electric passenger car - Google Patents
Locking mechanism for chassis battery of electric passenger car Download PDFInfo
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- CN102248879A CN102248879A CN2011101385563A CN201110138556A CN102248879A CN 102248879 A CN102248879 A CN 102248879A CN 2011101385563 A CN2011101385563 A CN 2011101385563A CN 201110138556 A CN201110138556 A CN 201110138556A CN 102248879 A CN102248879 A CN 102248879A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 claims description 33
- 239000000725 suspension Substances 0.000 claims description 9
- 230000013011 mating Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011020 iolite Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a locking mechanism for a chassis battery of an electric passenger car, which comprises an electric lock combined device and a battery hanging combined device matched with the electric lock combined device, wherein a torque is output to the electric lock combined device by a motor and the electric lock combined device is driven by a worm gear, thereby realizing the releasing and the locking between a worm gear arc-shaped slot and a battery combined hook. With the help of the releasing and the locking of the mechanism, the battery hanging combined device assembled with a battery is used for fixing or separating the battery with or from the electric passenger car. The locking mechanism for the chassis battery of the electric passenger car has the advantages of high automation degree, high reliability, strong matching property and low demand on operation skills, and can be used for quickly fixing or separating the battery with or from the electric passenger car.
Description
Technical field
The present invention relates to a kind of battery lock mechanism, especially a kind of electronic manned vehicle chassis battery lock mechanism.
Background technology
Present universal day by day along with electronlmobil, China is after becoming maximum fuel oil manned vehicle market, also, how to provide flying power easily and fast, make the battery altering problem become one of key problem in technology of electronic manned vehicle industrialized development at once becoming maximum electronic manned vehicle market.In the electronic manned vehicle market, battery hangs and fixes, substitute mode also mostly is bolted, manual dismounting mode, cause dismounting cell to need regulation place, regulation instrument, skilled operating personal, the big situation of long work capacity of operating time, have a strong impact on the work efficiency of changing battery, hit the user provides flying power to quick realization expectation.As shown in Figure 1, battery is arranged on the cell support frame, and the cell support frame is fixed on the vehicle frame mechanism by binding bolt, and assembling is comparatively loaded down with trivial details with the dismounting battery.How just can make battery and electronic manned vehicle chassis finish fixing in the short time fast and disengaging, effectively solve the problem that wastes time and energy that battery exists of changing, thoroughly eliminating the worry of user to electronic manned vehicle flying power technology shortcoming, is a problem demanding prompt solution.
Summary of the invention
The objective of the invention is provides a kind of simple in structure for overcoming above-mentioned the deficiencies in the prior art, and battery disassembly and assembly is convenient, increases work efficiency, and can prolong the electronic manned vehicle chassis battery lock mechanism of electronic manned vehicle flying power greatly.
For achieving the above object, the present invention adopts following technical proposals:
A kind of electronic manned vehicle chassis battery lock mechanism comprises some electronic lock composite sets and the battery that matches with it hangs composite set.
Described electronic lock composite set comprises and is arranged at worm gear and the worm screw that is meshed in the casing, and worm screw links to each other with the motor that is arranged at the casing outside, and worm gear matches with the battery suspension gear.
Described worm gear one side semicircle is provided with and the worm screw mating teeth, and the opposite side semicircle is the light face, and this light face is provided with the deep-slotted chip breaker of an end face opening.
Described worm gear by worm-wheel shaft, axle sleeve and fastener and worm screw square crossing be arranged on casing front side plate and the vehicle frame mechanism.
Described worm gear is provided with limit switch.
Described worm gear both ends of the surface are provided with the brace panel assembly opening.
Described worm screw two ends are arranged on the casing left side plate by tapered roller bearing respectively, and the outside of biside plate is equipped with roller bearing end cap.
Described battery hangs composite set and comprises cell support plate and battery combination hook, the battery combination hook is fixed on the cell support plate, described cell support plate is provided with battery position-limited trough and spigot surface, and described battery combination hook matches with deep-slotted chip breaker on the described worm gear.
Electronic lock composite set of the present invention by the worm and gear transmission, is realized opening and locking of worm gear deep-slotted chip breaker and battery combination hook by the motor output torque.
The worm gear profile is that a side semicircle has complete standard tooth form, and the opposite side semicircle is not processed profile of tooth.Do not process the semicircle of profile of tooth, design has deep-slotted chip breaker, forms suspension hook.The deep-slotted chip breaker angle is reasonable, but battery combination hook external diameter does not have and quickens and impact phenomenon in groove inside face smooth sliding.
The design of worm gear both ends of the surface has the brace panel assembly opening, uses brace panel in case of necessity, is used for improving worm gear and deep-slotted chip breaker suspension hook intensity, to adapt to the battery of Different Weight.
Worm screw is selected the self-locking type for use, parameter and worm gear coupling.The self-locking type specifically is that lead angle at reference cylinde meets mechanism's self-locking standard, can't reverse transmission, overcome battery combination gravity, and make battery be locked in design attitude.
Worm screw is supported and adopts tapered roller bearing to realize that worm screw connects with box side, can bear radial pull and axial thrust, meets the force request of this mechanism, guarantees worm and wheel transmission accuracy and reliability.
Worm gear support to adopt needle bearing to connect with worm-wheel shaft with iolite bushing realization worm gear, and it is big to rotate flexible bearing capacity, need not specially to safeguard, makes this mechanism can adapt to the abominable service conditions of automobile.
Spacing employing limit switch realizes that lock position is definite, and battery suspension combination is accurately engaged and disengaging with the electronic lock combination.
Design has battery position-limited trough and spigot surface on the cell support plate; The battery position-limited trough is used for battery in place and fixing, realizes firm assembling of battery and quick dismounting; Spigot surface is used at battery altering platform or replacing conveyor line, and battery hangs when composite set is finished lifting action and leads.
The battery combination hook is a kind of satisfy automatic guide and carrying effect structure design, is assemblied on the cell support plate, with cooperating of worm gear deep-slotted chip breaker, realizes engaging with the worm gear deep-slotted chip breaker and breaking away from.
Motor comprises drive of motor and control part, folding between output torque control worm gear deep-slotted chip breaker and the battery combination hook, and for electronic lock provides the power support, motor adopts auto-lock function simultaneously.
The present invention has the following advantages:
1, operates the realization automation, need not annexes such as manual assembling-disassembling bolt, realize worm gear deep-slotted chip breaker and battery combination opening of hook and locking, finish battery and hang fixing and disengaging between composite set and the electronic manned vehicle by the motor output torque; The bracing frame of supporting use battery altering platform or replacing conveyor line by lifting action, hangs composite set but quick fetching is equipped with the battery of battery.
2, safe, quadruplet electronic lock composite set is when assembling, and no matter worm gear deep-slotted chip breaker opening to the effective spacing and locking of battery combination hook, is the automobile acceleration and deceleration inwardly in opposite directions, all can avoid the battery combination hook to deviate from the worm gear deep-slotted chip breaker.
3, matching is stronger, only electronic lock need be made up by bolts assemblies on automobile structure, battery is placed in the cell support plate upper limit position groove, and automobile and battery are not had harmful the change, promptly adapts to factory and assembles in batches and can be used for the electronic manned vehicle transformation on the market.
4, operating skill is less demanding, the worm gear deep-slotted chip breaker has certain automatic guide ability with the battery combination hook when engaging, in the loose operating range of deep-slotted chip breaker, all can accurately finish and cooperate with latch hook, compare bolted high precision positioning requirements, big improvement is arranged, see Fig. 1, electronic manned vehicle battery hangs present situation, adopt Bolt Connection, the positioning requirements height, dismounting is more loaded down with trivial details.
5, the worm and gear transmission of the present invention's employing, the unfailing performance height, with respect to the action that push rod, sprocket wheel, belt are realized, self-locking performance, safety, durability have greater advantage.
Description of drawings
Fig. 1 is that electronic manned vehicle battery hangs and fixing present situation structural representation;
Fig. 2 is an electronic lock composite set constructional drawing of the present invention;
Fig. 3 be among Fig. 2 A-A to cutaway view;
Fig. 4 is that electronic lock composite set of the present invention and battery hang the composite set assembly drowing;
Fig. 5 is the birds-eye view of Fig. 4.
Wherein, 1. box side, 2. chassis cover, 3. worm screw, 4. tapered roller bearing, 5. roller bearing end cap, 6. motor, 7. worm-wheel shaft, 8. fastener, 9. axle sleeve, 10. worm gear, 11. limit switch, 12. binding bolts, 13. vehicle frame mechanisms, 14. the battery combination hook, 15. batteries, 16. cell support plates, 17. the electronic lock composite set, 18. deep-slotted chip breakers, 19. spigot surfaces.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Shown in Fig. 2-5, a kind of electronic manned vehicle chassis battery lock mechanism comprises four groups of electronic lock composite sets 17 and the battery that matches with it hangs composite set.Described electronic lock composite set comprises and is arranged at the worm gear that is meshed in the casing 10 and worm screw 3 (dextrorotation), and worm screw 3 links to each other with the motor 6 that is arranged at the casing outside, and worm gear 10 matches with the battery suspension gear.Electronic lock composite set of the present invention by the worm and gear transmission, is realized opening and locking of worm gear deep-slotted chip breaker 18 and battery combination hook 14 by motor 6 output torques.Motor 6 comprises drive of motor and control part, folding between output torque control worm gear deep-slotted chip breaker 18 and the battery combination hook 14, and for electronic lock provides the power support, motor 6 adopts auto-lock function simultaneously.
Described worm gear 10 1 side semicircles are provided with the complete full-height tooth that is meshed with worm screw 3, and it is the light face that the opposite side semicircle is not processed profile of tooth, and this light face is provided with the deep-slotted chip breaker 18 of an end face opening, form suspension hook.Deep-slotted chip breaker 18 angles are reasonable, but battery combination is linked up with 14 external diameters in deep-slotted chip breaker 18 inside face smooth sliding, do not have and quicken and impact phenomenon.
Described worm gear 10 by worm-wheel shaft 7, axle sleeve 9 and fastener 8 and worm screw 3 square crossings be arranged on casing front side plate and the vehicle frame mechanism 13.Described fastener is a binding bolt 12.Worm gear 10 adopts needle bearings to connect with worm-wheel shaft 7 with iolite bushing 9 realization worm gears 10, and it is big to rotate flexible bearing capacity, need not specially to safeguard, makes this mechanism can adapt to the abominable service conditions of automobile.
Described worm gear 10 is provided with limit switch 11, and the realization lock position is determined, makes battery hang composite set and accurately engages and disengaging with electronic lock composite set 17.
Described worm gear 10 both ends of the surface are provided with the brace panel assembly opening, use brace panel in case of necessity, are used for improving worm gear 10 and deep-slotted chip breaker 18 suspension hook intensity, to adapt to the battery of Different Weight.
Described worm screw 3 two ends are arranged on the casing left side plate by tapered roller bearing 4 respectively, realize that worm screw 3 connects with box side 1, can bear radial pull and axial thrust, meet the force request of this mechanism, guarantee worm screw 3 and worm gear 10 transmission accuracies and reliability.The outside of biside plate is equipped with roller bearing end cap 5.Worm screw 3 is selected the self-locking type for use, parameter and worm gear 10 couplings.The self-locking type specifically is that lead angle at reference cylinde meets mechanism's self-locking standard, can't reverse transmission, and overcome battery and hung composite set gravity, make battery hang composite set and be locked in design attitude.
Described battery hangs composite set and comprises cell support plate 16 and battery combination hook 14 and battery 15, and battery combination hook 14 is fixed on the cell support plate 16, and described cell support plate 16 is provided with battery position-limited trough and spigot surface 19.Battery 15 is assemblied in the battery position-limited trough, can realize firm assembling and quick dismounting; Spigot surface 19 is used at the battery altering platform or changes conveyor line, and battery hangs the composite set lifting and leads, and realization is moved steadily and be accurate.Described battery combination hook 14 matches with deep-slotted chip breaker 18 on the described worm gear 10.
As shown in Figure 2, tapered roller bearing 4 outer rings are assemblied in the box side 1, utilize roller bearing end cap 5 axial location, and inner ring is assemblied on the worm screw 3; Worm screw 3 is assembled on the box side 1 by bearing, and a side is connected with motor 6; Axle sleeve 9 cooperates with circle in the worm gear 3, is assembled on the opposite side box side by worm-wheel shaft 7, fastener 8; Worm gear 10 and worm screw 3 engagements, width between centers 50mm; Limit switch 11 is assemblied on the worm gear.
When worm gear 10 rotates predetermined angular, by limit switch 11 position control, battery combination hook 14 breaks away from fully with worm gear deep-slotted chip breaker 18.
Matching used with it battery altering conveyor line, its bracing frame descends, battery hang composite set along spigot surface 19 to lower slider and from electronic manned vehicle, taken away and transport.Taking-up used batteries 15 from battery suspension composite set are reentered into new battery and transhipment is returned.Battery altering conveyor line bracing frame rises, and battery hangs composite set and finishes upwards sliding action along spigot surface 19.
When worm gear 10 rotation predetermined angulars, battery combination hook 14 and worm gear deep-slotted chip breaker 18 tip engages, motor 6 cuts out simultaneously, and worm gear 3 is by locked, and battery hangs the design attitude that composite set has been fixed on electronic manned vehicle.
Rotate by twice turbine and worm, the battery combination hook is realized opening and locking with the worm gear deep-slotted chip breaker, and matching used battery altering platform or replacing conveyor line have been finished a complete replacing battery flow process.
Standard is adopted in the modulus of worm screw 3, profile of tooth, transmission when parameter such as the number of teeth, can be with reference to GB/T10085-1988, and modulus m=1, a number z
1=1, external diameter φ 18, transmitting ratio i=82; Material selection gauge material 40Cr, case hardening is handled.
Worm gear 10 and worm screw 3 couplings, modulus m=1 wherein, number of teeth z
2=82, material adopts casting al-bronze, withstanding corrosion, intensity height; Deep-slotted chip breaker 18 inside face fine limit works, groove width and battery combination hook external diameter adopt big free-running fit type.
Fig. 4 and Fig. 5 are that electronic lock composite set and battery hang the composite set assembly drowing, use quadruplet altogether, symmetric arrangement, and wherein worm gear deep-slotted chip breaker 18 openings are inwardly arranged in opposite directions, can change deep-slotted chip breaker 18 opening directions by the mounting means that changes worm gear 10.Deep-slotted chip breaker opening among Fig. 4 inwardly, this kind arrangement, the worm gear 10 of two groups of electronic locks produces interaction forces before and after making.For example, during car deceleration, force of inertia forward makes last Battery pack combined hook 14 deviate from deep-slotted chip breaker 18 opening directions and promotes worm gear 10, back one Battery pack combined hook 14 surpasses to deep-slotted chip breaker 18 opening directions pulling worm gear 10, motor 6 is realized interlock, application force is cancelled out each other, and self-locking structure is reliably guaranteed.
Claims (8)
1. electronic manned vehicle chassis battery lock mechanism is characterized in that: comprise some electronic lock composite sets and the battery that matches with it hangs composite set.
2. electronic manned vehicle according to claim 1 chassis battery lock mechanism, it is characterized in that: described electronic lock composite set comprises and is arranged at worm gear and the worm screw that is meshed in the casing, worm screw links to each other with the motor that is arranged at the casing outside, and worm gear matches with the battery suspension gear.
3. electronic manned vehicle according to claim 2 chassis battery lock mechanism is characterized in that: described worm gear one side semicircle is provided with and the worm screw mating teeth, and the opposite side semicircle is the light face, and this light face is provided with the deep-slotted chip breaker of an end face opening.
4. electronic manned vehicle according to claim 3 chassis battery lock mechanism is characterized in that: described worm gear by worm-wheel shaft, axle sleeve and fastener and worm screw square crossing be arranged on casing front side plate and the vehicle frame mechanism.
5. electronic manned vehicle according to claim 4 chassis battery lock mechanism, it is characterized in that: described worm gear is provided with limit switch.
6. electronic manned vehicle according to claim 5 chassis battery lock mechanism, it is characterized in that: described worm gear both ends of the surface are provided with the brace panel assembly opening.
7. electronic manned vehicle according to claim 2 chassis battery lock mechanism, it is characterized in that: described worm screw two ends are arranged on the casing left side plate by tapered roller bearing respectively, and the outside of biside plate is equipped with roller bearing end cap.
8. electronic manned vehicle according to claim 1 chassis battery lock mechanism, it is characterized in that: described battery hangs composite set and comprises cell support plate and battery combination hook, the battery combination hook is fixed on the cell support plate, described cell support plate is provided with battery position-limited trough and spigot surface, and described battery combination hook matches with deep-slotted chip breaker on the described worm gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110138556 CN102248879B (en) | 2011-05-26 | 2011-05-26 | Locking mechanism for chassis battery of electric passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110138556 CN102248879B (en) | 2011-05-26 | 2011-05-26 | Locking mechanism for chassis battery of electric passenger car |
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| Publication Number | Publication Date |
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| CN102248879A true CN102248879A (en) | 2011-11-23 |
| CN102248879B CN102248879B (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110138556 Active CN102248879B (en) | 2011-05-26 | 2011-05-26 | Locking mechanism for chassis battery of electric passenger car |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700393A (en) * | 2012-06-29 | 2012-10-03 | 山东电力集团公司电力科学研究院 | Chassis battery locking mechanism of electric passenger car |
| CN102717778A (en) * | 2012-06-29 | 2012-10-10 | 山东电力集团公司电力科学研究院 | Chassis battery change system for electric passenger cars and method of the system |
| CN102785562A (en) * | 2012-08-08 | 2012-11-21 | 沈阳中科正方新能源技术有限公司 | Battery positioning locking and unlocking system of electric vehicle |
| CN109515148A (en) * | 2018-05-29 | 2019-03-26 | 蔚来汽车有限公司 | Circumferential lockable mechanism, the battery locking device including it, power battery pack and vehicle |
| CN109733341A (en) * | 2019-01-28 | 2019-05-10 | 于小兵 | Battery frame jacking system and elevating method |
| CN112297811A (en) * | 2020-11-05 | 2021-02-02 | 东风柳州汽车有限公司 | New energy automobile battery package quick change device |
| WO2021185294A1 (en) * | 2020-03-17 | 2021-09-23 | 奥动新能源汽车科技有限公司 | Lock mechanism for battery pack, bracket assembly, battery pack, electric vehicle, and lock method for battery pack |
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| CN2392871Y (en) * | 1999-09-08 | 2000-08-23 | 郑光远 | Mechanical device of electronic lock |
| CN2549597Y (en) * | 2002-06-04 | 2003-05-07 | 郑洁洪 | Anti-theft accumulator battery for vehicle |
| CN2932629Y (en) * | 2006-08-07 | 2007-08-08 | 翟书章 | Drawer-type electric vehicle storage battery, accessory tool and charging battery frame |
| CN201218963Y (en) * | 2008-05-07 | 2009-04-08 | 曹道芳 | Decoding anti-theft electronic electric door lock of electric car and its electronic encoding key |
| CN102211517A (en) * | 2011-05-04 | 2011-10-12 | 广州市赛导电气技术有限公司 | Electric vehicle chassis |
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2011
- 2011-05-26 CN CN 201110138556 patent/CN102248879B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392871Y (en) * | 1999-09-08 | 2000-08-23 | 郑光远 | Mechanical device of electronic lock |
| CN2549597Y (en) * | 2002-06-04 | 2003-05-07 | 郑洁洪 | Anti-theft accumulator battery for vehicle |
| CN2932629Y (en) * | 2006-08-07 | 2007-08-08 | 翟书章 | Drawer-type electric vehicle storage battery, accessory tool and charging battery frame |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700393A (en) * | 2012-06-29 | 2012-10-03 | 山东电力集团公司电力科学研究院 | Chassis battery locking mechanism of electric passenger car |
| CN102717778A (en) * | 2012-06-29 | 2012-10-10 | 山东电力集团公司电力科学研究院 | Chassis battery change system for electric passenger cars and method of the system |
| CN102717778B (en) * | 2012-06-29 | 2014-06-11 | 山东电力集团公司电力科学研究院 | Chassis battery change system for electric passenger cars and method of the system |
| CN102700393B (en) * | 2012-06-29 | 2015-03-04 | 山东电力集团公司电力科学研究院 | Chassis battery locking mechanism of electric passenger car |
| CN102785562A (en) * | 2012-08-08 | 2012-11-21 | 沈阳中科正方新能源技术有限公司 | Battery positioning locking and unlocking system of electric vehicle |
| CN102785562B (en) * | 2012-08-08 | 2015-07-01 | 沈阳中科正方新能源技术有限公司 | Battery positioning locking and unlocking system of electric vehicle |
| CN109515148A (en) * | 2018-05-29 | 2019-03-26 | 蔚来汽车有限公司 | Circumferential lockable mechanism, the battery locking device including it, power battery pack and vehicle |
| CN109733341A (en) * | 2019-01-28 | 2019-05-10 | 于小兵 | Battery frame jacking system and elevating method |
| WO2021185294A1 (en) * | 2020-03-17 | 2021-09-23 | 奥动新能源汽车科技有限公司 | Lock mechanism for battery pack, bracket assembly, battery pack, electric vehicle, and lock method for battery pack |
| CN112297811A (en) * | 2020-11-05 | 2021-02-02 | 东风柳州汽车有限公司 | New energy automobile battery package quick change device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102248879B (en) | 2013-05-08 |
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Application publication date: 20111123 Assignee: National Network Intelligent Technology Co., Ltd. Assignor: Shandong Research Inst. of Electric Power Contract record no.: X2019370000007 Denomination of invention: Locking mechanism for chassis battery of electric passenger car Granted publication date: 20130508 License type: Exclusive License Record date: 20191014 |
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Assignee: National Network Intelligent Technology Co.,Ltd. Assignor: Shandong Electric Power Research Institute Contract record no.: X2019370000007 Date of cancellation: 20210324 |
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Effective date of registration: 20220119 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: State Grid Co., Ltd. Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: State Grid Co., Ltd. |
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